Questions tagged [connections]
One or more connections to a database or database server. For questions about *establishing* a connection, use the **connectivity** tag instead.
0
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1answer
18 views
MySQL stalls and strange threads/connections behavior is observed
We have a MySQL instance which most of the time works just fine. From time to time, however, we observe strange behavior. What happens is that suddenly MySQL connections reach the limit (currently set ...
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0answers
12 views
Error reading packet from server: Lost connection to MySQL server during query ( server_errno=2013)
Getting one issue in error log in every 30-45 mins. Mysql version 5.6.20-log
Server is slave of master main server and its having 100 slaves to this server.
Replication hierarchy is there in 3 stages.
...
6
votes
2answers
118 views
Are CNAME aliases for connection strings a good idea?
To be very flexible and move database to different servers more easily, we came up with the idea of using an alias per database. So by simply changing a DNS entry, we can route all queries to a ...
0
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1answer
19 views
pg_dump: Write failed: Connection reset by peer
we are trying to move all database data to other location.
we chose to perform pg_dump and we encountered few problems:
first was out of memory problem:
during pg_dump initialization we get an error:
...
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0answers
18 views
Sharing read/write resources between connections in an unfair way
I have two applications that connect to a Postgresql database.
A read-only application querying tuned MVs
A write-only application updating the database and the MVs
We only really require that (1) ...
0
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1answer
56 views
Can't connect to MS SQL Server via IP address anymore
I'm using a PLC connected to a laptop (over EthernetIP). The development software for programming the PLC has a built in settings page for connecting it to various database engines (MySQL, PostgreSQL, ...
1
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1answer
39 views
“Keyword not supported: Server” error when using ADO.NET connection string to connect to Azure DB
I have an ASP.Net project that I am running. I have added a database to Azure, and Azure generated a connection string for the database. When running the application I however get an error stating ...
3
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3answers
888 views
Database Connection vs Raw TCP Connection [closed]
I have some fundamental questions about how database clients & database interact
Do databases support multiple transactions simultaneously on a single database connection from client? If not, why ...
0
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1answer
178 views
Keep H2 in-memory database between connections
I create and use a H2 database in-memory (no writing to storage) for demos and quick tests using this code in Java:
Connection conn = DriverManager.getConnection( "jdbc:h2:mem:example_db" ) ;
This ...
1
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0answers
74 views
Switching users in PgAdmin
I'm looking for a way to enable switching between users in pgAdmin 4. I'm aware of the possibilty to change user from the properties-dialog before connecting. However this isn't useful when I'm ...
2
votes
2answers
191 views
What is purpose of `ALLOW_CONNECTIONS` being set so no one can connect to the new Postgres database?
In Postgres 11, the CREATE DATABASE command that makes a new catalog has an option ALLOW_CONNECTIONS. The documentation says this option can be used to block all connections to the database:
[ ...
0
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1answer
156 views
Can `listen_addresses` system configuration setting in Postgres stop pre-authentication exploits?
You can set various configuration parameters for Postgres by either editing the postgresql.conf file manually or by calling ALTER SYSTEM commands.
One of those config settings is listen_addresses. ...
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2answers
32 views
MySQL: No. of Connections
I have a medium sized database (7 GB) with around 200 concurrent users. I am getting some database lag issues, suddenly my node-mysql client freezes during selects and inserts.
As a process of ...
2
votes
1answer
56 views
What connection do internal sessions belong to in MS SQL Server?
By querying
select * from sys.dm_exec_connections
I do not see corresponding connections for internal sessions, about the existance of which I know from sys.dm_exec_sessions DMV.
My questions is ...
0
votes
1answer
29 views
database connection and sessions in an example of social media
I am referring to MS SQL connection and sessions. I know that each application should make a connection in order to access the database, and each connection can have multiple sessions. In case of a ...
2
votes
1answer
591 views
Logon failed for login due to trigger execution
I have been trying to login using one of my sql server logins but I am getting the error message below:
General Error Message
Copy Message Text
TITLE: Connect to Server
-----------------------------...
2
votes
2answers
188 views
Cannot connect to <instance>. A severe error occurred on the current command
Recently, and on more than one occasion now, we have attempted to connect from one of our SQL Server instances to another using SSMS only to be greeted with the following error:
A severe error ...
0
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1answer
53 views
Percona pt-table-sync Can't determine Master
We have following Multi master replication scenario. We are using MariaDB 10.1.34 and Percona 3.0.11
Master: Name: db-master1 (192.168.14.5)
Slave:
Name: db-slave2 (192.168.15.5) Replica Connection ...
1
vote
1answer
67 views
DBForge can't connect with MySQL server, server is running
I recently installed the latest version of MySQL Server.
I initialized it with --initialize-insecure so I have a "root" user with no password set.
The server is running, with the command mysqld --...
2
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0answers
311 views
Very Sporadic Cannot initialize the data source object of OLE DB provider “SQLNCLI11” for linked server
OLE DB provider "SQLNCLI11" for linked server "001" returned message "Unable to complete login process due to delay in opening server connection".
Msg 7303, Level 16, State 1, Line 19
Cannot ...
2
votes
1answer
151 views
Stored Procedure Execute as Owner Close Database Connections Not Working
I created a stored procedure to allow users to Close All Db connections in the QA environment. I am SA and created the procedure.
When I modify the SP , run it Without 'Execute as Owner', I get ...
0
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0answers
22 views
How to connect to mdb fie
I have a exe file that read and write from local Db file.
I check this file with Detect It Easy and it tell me that is mdb file.
I can open this file with Microsoft Access, and watch all the tables ...
1
vote
1answer
78 views
Mysql 5.7 cannot start again
For the first time in my life, I have Ubuntu, so I do not know much how to manage and what should I be looking for; I'm using version 18.04.
I installed MySQL 5.7, it worked great for a couple of days ...
1
vote
1answer
18 views
Permission errors on insert after schema drop/create (Pg 9.0.23)
We have a web application that allows users to modify data through an API. In order to allow people to run tests, we provide a sandbox area called 'daily'. This sandbox gets refreshed every day from ...
0
votes
2answers
87 views
Unable to connect from remote computer, while local connection works
I have a Windows 2008 R2 64-bit server with SQL server 2008 R2 installed on it.
I manage to log to SQL server with SSMS with the sa SQL account and with a test SQL account.
But when I try to ...
0
votes
1answer
56 views
Having multiple ResultSets in parallel on same connection.. Will it cause any problem? [Mysql/Postgres] [closed]
I have tried out the following in my local machine using jdbc/mysql:
step 1: conn = getNewConnection
step 2: stmt1 = "new statement" using connection 'conn'
step 3: stmt2 = "new statement" using ...
0
votes
1answer
320 views
“undefined function pg_pconnect()” when connecting to Postgres from CodeIgniter
I just installed Postgresql and pgadmin in my Ubuntu system. I can create a database from the pgadmin interface and everything seems ok, but when I try to connect to the database from my CodeIgniter ...
1
vote
1answer
321 views
in what situations the dynamic port number in sql server is used?
I have the following script to find out what is the Static and dynamic port numbers:
--===============================
-- sys.dm_exec_connections
--===============================
SELECT
[user]=...
0
votes
2answers
41 views
Connections increasing by 10+ a second with no requests
I'm getting no answers from my host, but I suspect their DB servers are compromised.
I was getting some ridiculous page loads for requests to a standard Wordpress installation - upwards of 30 seconds,...
1
vote
2answers
1k views
What reason could cause AWS RDS connections to
It's my first time using RDS on AWS, I use a t2.medium instance running MySQL Aurora with default configs. The CPU usage and DB connections is quite normal until "something" happen, which cause the DB ...
1
vote
1answer
359 views
Connection's MAC address randomly changes on Windows 10, then stops
Because reasons (tm), we want to identify the client's MAC address on SQL Server side (local network, not about security, enables a very convenient feature in way transparent for applications).
We do ...
0
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2answers
977 views
Oracle Client sessions keep disconnecting
We recently moved our Oracle server from a remote location to a local server and now the Oracle clients keep disconnecting.
It does not seem to be a timeout issue because it happens while we are ...
0
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1answer
45 views
Check connection details to SQL Server 2000/2005
I want to migrate some databases hosted in SQL Server 2000/2005 to SQL Server 2014.
I don't have direct access to the databases and I want to know all applications connecting to it and connection ...
0
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2answers
914 views
Cannot connect to mongos
Following the MongoDB Sharding Documentation, I start a mongos using a configuration file with the specifics of my config server.
It seems rather straightforward, yet I am running into an issue. I ...
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0answers
38 views
How do I set up an Active Directory group to use with DSN-less linked tables from MS Access to SQL Server
I have set up a group in Active Directory.
I have added all my users to that group.
I have set up a login for the group with default database as mydb.
The login is a member of the public server ...
1
vote
1answer
356 views
Azure SQL Databases: High number of SA connections with “BRKR TASK” and “TASK MANAGER” commands
Found out that all our Azure SQL Databases (pricing tiers S1-S2) have high number of connections/sessions from SA
SA - BRKR TASK - around 60 sessions
SA - TASK MANAGER - around 20 sessions
Here are ...
0
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1answer
51 views
What if a connection closes in the middle of a commit?
I have a few large CSV files to upload to an instance of SQL Server.(Nope, can't use SSMS)
I'm using JDBC to read the CSVs line by line and insert the lines in a table in batches.
Supposing my code is ...
1
vote
2answers
178 views
SQL server 2008R2 default encryption?
I was wondering if SQL server 2008 R2 has any default security if you're using it via ODBC or SQL Server Management Studio?
I was reading about SSL here
https://technet.microsoft.com/en-us/library/...
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0answers
28 views
Repeated login failures from SSMS to different databases
I have a SQL Server 2016 instance. One user has a login with a user mapped to a single database on this instance. Whenever the user is connected to the instance, a login failure is generated every 5 ...
0
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2answers
281 views
How to connect from local computer (mac) to remote Oracle DB and execute script and save results to CSV?
I can connect to remote Oracle DB using this signature:
sqlplus 'user/pass@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(Host=hostname.network)(Port=1521))(CONNECT_DATA=(SID=remote_SID)))'
Now want to ...
0
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1answer
1k views
Python Postgres psycopg2 ThreadedConnectionPool exhausted
I have looked into several 'too many clients' related topic here but still can't solve my problem, so I have to ask this again, for me specific case.
Basically, I set up my local Postgres server and ...
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0answers
136 views
Postgres vacuum drops connections
I receive randomly errors for database connections, like: socket closed.
I observed postgres logs and found suspicious line: database system was interrupted. Can that happen that postgres drops the ...
1
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0answers
225 views
Keeping MySql connections alive
I'm running a Windows service, which connects to a MySql database via Entity Framework.
Every 10 seconds it issues a query to the database to see if any new records have been added. If it finds any, ...
1
vote
1answer
861 views
Reasonable values for thread_cache_size in relation with Connections [closed]
I want to know reasonable values for thread_cache_size in relation with the connections that you have. Which is the good proportion? And which proportions do you handle in relation with your clients ...
0
votes
3answers
115 views
How to limit the number of sessions for a specific login [closed]
How can we let just one program to connect to the database, in case many programs have the connection string.
(limit the number of sessions for a specific login)
1
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1answer
141 views
SQL Server Error “Database 'mssqlsystemresource' does not exist.”
On Linux, whenever I run use mssqlsystemresource to get access to Resource Database, I get an error. How do I resolve this.
1> use mssqlsystemresource
2> go
Msg 911, Level 16, State 1, Server ...
1
vote
3answers
671 views
Error Message Saying “Invalid Object Name” [closed]
I have been following a SQL course for the past few weeks and I never have had this problem: my database is connected but I get the error message saying "Invalid Object Name". Please see picture.
0
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1answer
2k views
Unable to connect to pluggable database in Oracle 12c
I have oracle database Oracle Database 12c Enterprise Edition 12.2.0.1.0, and I created a pluggable database named DEVDB to use it in web application development, I created it using the Database ...
0
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1answer
460 views
Connect Oracle Database 12c via SQL Developer when it is in restricted mode
I would like to connect to database 12c via SQL Developer(in same VM where db is hosted) when it is in restrict mode. Tried below approaches but nothing worked.
Kindly help !
Added (UR=A) in tnsname....
0
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1answer
21 views
Can't see connexion to Postgresql using php
I have created a php form to connect to a remote postgresql database. It seems that I can log in successfully because my message "connexion succeeded" appears.
But I can't see the corresponding line ...
